[Contextual Search] Add support for crushed sprites and animate the search provider icon

ui/android/java/src/org/chromium/ui/resources/sprites/CrushedSpriteResourceLoader.java

Index: ui/android/java/src/org/chromium/ui/resources/sprites/CrushedSpriteResourceLoader.java
diff --git a/ui/android/java/src/org/chromium/ui/resources/sprites/CrushedSpriteResourceLoader.java b/ui/android/java/src/org/chromium/ui/resources/sprites/CrushedSpriteResourceLoader.java
new file mode 100644
index 0000000000000000000000000000000000000000..1f022b4594b4ebc0da1192718aefb343afe12b5d
--- /dev/null
+++ b/ui/android/java/src/org/chromium/ui/resources/sprites/CrushedSpriteResourceLoader.java
@@ -0,0 +1,50 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.ui.resources.sprites;
+
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+
+import org.chromium.ui.resources.AndroidResourceType;
+import org.chromium.ui.resources.Resource;
+import org.chromium.ui.resources.ResourceLoader.ResourceLoaderCallback;
+
+/**
+ * Handles loading {@link CrushedSpriteResource}s.
+ */
+public class CrushedSpriteResourceLoader {
+
+    private final ResourceLoaderCallback mCallback;
+    private final Resources mResources;
+
+    /**
+     * Creates an instance of {@link CrushedSpriteResourceLoader}.
+     * @param callback The {@link ResourceLoaderCallback} to notify when a {@link Resource} is
+     *                 loaded.
+     * @param resources A {@link Resources} instance to load assets from.
+     */
+    public CrushedSpriteResourceLoader(ResourceLoaderCallback callback, Resources resources) {
+        mCallback = callback;
+        mResources = resources;
+    }
+
+    /**
+     * Loads the {@link Bitmap} for {@link CrushedSpriteResource} specified by {@code bitmapResId}
+     * and metadata specified by {@code metadataResId} and notifies the
+     * {@link ResourceLoaderCallback}.
+     * @param bitmapResId The id of the bitmap resource.
+     * @param metadataResId The id of the raw resource containing JSON metadata.
+     */
+    public void loadResource(int bitmapResId, int metadataResId) {
+        CrushedSpriteResource resource = new CrushedSpriteResource(
+                bitmapResId, metadataResId, mResources);
+        mCallback.onResourceLoaded(AndroidResourceType.CRUSHED_SPRITE, bitmapResId, resource);
+    }
+
+    public Bitmap reloadResource(int bitmapResId) {
+        return CrushedSpriteResource.loadBitmap(bitmapResId, mResources);
+    }
+
+}